Preparation of Micron-Sized Spherulitic Bisphenol A Polycarbonate Particles in Thin Films

✍ Scribed by Yuesheng Ye; Kyu Yong Choi

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 566 KB
• Volume: 294
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200900165

✦ Synopsis

Abstract

A facile technique is presented to prepare discrete µm‐sized spherulitic particles of BAPC in thin polymer films. Unlike in bulk precipitation or spray crystallization, the present technique offers a method to prepare three‐dimensional semicrystalline particles of narrow particle size distribution that can be readily isolated and collected from the glass substrate as discrete particles. We report the effects of polymer molecular weight, polymer type, and the precursor polymer film thickness on the formation of spherulitic particles and their morphologies. The three‐dimensional spherulitic particles prepared in this study have large specific surface areas, higher crystallinity and melting temperature than the bulk precipitated and crystallized polycarbonate particles.

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